However, there are three such spacings that are by far the most commonly used. Those three show an isobar for every 1, 2, or 4 millibars. Which is used depends on the scale of the map involved and ...

For anyone with an interest in winds, isobars on weather maps are important. Variations in air pressure drive the winds on earth, and isobars–lines of equal pressure–offer an easy way for ...

Using isobars on weather maps is completely accurate. Wind derives its initial speed and direction from changes in air pressure over distance, or pressure gradient force (PGF). This is why when ...

Isobars are drawn by connecting points having equal sea-level air pressure, using a specified contour interval. Because air pressure decreases at a rate of about 1 inch per thousand feet of ...

Isobars are drawn by connecting points having equal sea-level air pressure, using a specified contour interval, allowing meteorologists not only to pinpoint the location of high and low pressure ...